Team Ninja has released a new trailer and screenshots for Yaiba: Ninja Gaiden Z, showing new bosses, harvested weapons, and an all-new environment featuring an enormous armored fortress. Ensconced within are a pack of massive, two-headed zombie toddlers known as the Terrible Two. Gruesome. Yaiba: Ninja Gaiden Z will be available for PlayStation 3 and Xbox 360 on March 18 and via Steam on March 21.